Well,1 water isn't enough.But she could be having swallowing problems.Puking isn't normally.I'm not sure what she has.Sounds like she's dehidrATED,but at this point,to me it doesn't sound like a death causing problem,but to be positive
i'd have her veted on.
How many waterers are there?She may be overhighdrated.And if you only have a few,hens wont drink and shes at the bottom so she's probably picked on whenever she goes to grab a drink.Also the fact she's at the bottom won't allow her to get anything in her diet,so that's probably why she's not...